[PATCH] matroxfb: Use CACHEFLUSH on all chips

Use the CACHEFLUSH register on all chip types.  The register is listed in all
other specs except 2064W.  However I have verified that the register does work
on a 2064W despite being marked reserved in the specs.  There were no
noticeable side effects after writing to the register.

Signed-off-by: Ville Syrjälä <syrjala@sci.fi>
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/video/matrox/matroxfb_base.c b/drivers/video/matrox/matroxfb_base.c
index 1734438f7d7c..a780bb30ffc0 100644
--- a/drivers/video/matrox/matroxfb_base.c
+++ b/drivers/video/matrox/matroxfb_base.c
@@ -1283,7 +1283,7 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
         vaddr_t vm;
         unsigned int offs;
         unsigned int offs2;
-        unsigned char store, orig;
+        unsigned char orig;
         unsigned char bytes[32];
         unsigned char* tmp;
 
@@ -1299,16 +1299,12 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
         orig = mga_inb(M_EXTVGA_DATA);
         mga_outb(M_EXTVGA_DATA, orig | 0x80);
 
-        store = mga_readb(vm, 0x1234);
         tmp = bytes;
         for (offs = 0x100000; offs < maxSize; offs += 0x200000)
                 *tmp++ = mga_readb(vm, offs);
         for (offs = 0x100000; offs < maxSize; offs += 0x200000)
                 mga_writeb(vm, offs, 0x02);
-        if (ACCESS_FBINFO(features.accel.has_cacheflush))
-                mga_outb(M_CACHEFLUSH, 0x00);
-        else
-                mga_writeb(vm, 0x1234, 0x99);
+        mga_outb(M_CACHEFLUSH, 0x00);
         for (offs = 0x100000; offs < maxSize; offs += 0x200000) {
                 if (mga_readb(vm, offs) != 0x02)
                         break;
@@ -1319,7 +1315,6 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
         tmp = bytes;
         for (offs2 = 0x100000; offs2 < maxSize; offs2 += 0x200000)
                 mga_writeb(vm, offs2, *tmp++);
-        mga_writeb(vm, 0x1234, store);
 
         mga_outb(M_EXTVGA_INDEX, 0x03);
         mga_outb(M_EXTVGA_DATA, orig);